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Topic under MicrocontrollersSource: www.pragyan.org File size:172 KBFile type:pdfLast download on:
Wed Dec 13, 2017 09:07:53 PMShort Desciption:
Whenever a robotics hobbyist talk about making a robot, the first thing comes
to his mind is making the robot move on the ground. And there are always two
options in front of the designer whether to use a DC motor or a stepper motor.
When it comes to speed, weight, size, cost... DC motors are always preffered
over stepper motors. There are many things which you can do with your DC
motor when interfaced with a microcontroller. For example you can control the
speed of motor, you can control the direction of rotation, you can also do
encoding of the rotation made by DC motor i.e. keeping track of how many
turns are made by your motors etc. So you can see DC motors are no less than
a stepper motor.

Summary:
In this part of tutorial we will learn to interfacing a DC motor with a
microcontroller. Usually H-bridge is preffered way of interfacing a DC motor.
These days many IC manufacturers have H-bridge motor drivers available in the
market like L293D is most used H-Bridge driver IC. H-bridge can also be made
with the help of trasistors and MOSFETs etc. rather of being cheap, they only
increase the size of the design board, which is somtimes not required so using
a small 16 pin IC is preffered for this purpose.
►Working Theory of H-Bridge
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